124 
MOLLUSCA. 
visionally, until the knowledge of the living animal and its radula may confirm or 
refute 
this view. 
Albers proposed for it the subgenus Pelia (of Helix), which he placed 
between Patula and Gonostoma; but this name was already twice preoccupied in 
zoology, among the Crustacea in 1835, and in the Lepidoptera in 1849. 
PSEUDOHYALINA. 
Pseudohyalina, Morse, Journ. Portland Soe. i. p. 16 (1864). | 
Chanomphalus, Strebel (et Pfeffer), Beitr. Mex. Land- und Siissw.-Conch. iv. p. 19 (1880). 
Pycnogyra, Strebel, loc. cit. p. 20. 
Shell somewhat glossy, but with minute sculpture, rather whitish, diaphanous ; 
aperture simple; umbilicus wide. 
median projection. 
of the 
whole number. 
Jaw minutely perpendicularly. striated, with a small _ 
Radula with spiniform lateral teeth, amounting to about a third 
This genus connects somewhat the family Oxygnatha with the Aulacognatha, on 
account of the sculpture (minute, however) of the shell and jaw. P. Fischer [Manuel 
de Conch. fasc. v. p. 470 (1882)] has treated it as only a section of Patula; but the 
form of the marginal teeth, I think, places it distinctly near Hyalinia. 
Nomen.. 
Forma. Basis. Sculptura. Coloratio. Diam. Anfr. Patria. 
mm. | mm. 
minuscula, Binn. | subdiscoidea,spira | perspective um-| minute striatula. | corneo-albida. 24 13 4 |N. Am. E. & SE. 
leviter convexa, | _bilicata. Mexico, Yucatan, 
rotundata, E. Guatemala, 
Centr. Nicaragua, 
Antilles, &e, 
elegantula, Pfr...|discoidea, spira| late umbilicata. _| distincte costulata | albida. 13 4 33 | E.Mexico,W. Guate- 
plana, rotun- usque in umbi- mala, Centr. Costa 
data. licum. Rica. 
cidariscus,v.Mart.| subdepressa, spira ” » 3 24 2 4 |S8.E. Mexico. 
gradata, rotun- 
data. 
berendti, Pfr. ...|depressa, —_spira | perspective umbi- | minute costulata. | corneo-flava. 4 24 63 | EH. Mexico. 
prominula, an-|  licata, 
gulata. 
A. Whorls 4, rounded. (PSEUDOHYALINA, sensu str.) 
1. Pseudohyalina minuscula. 
Helix minuscula, Binney, Bost. Journ. Nat. Hist. iii, p- 435, t. 22. fig. 4 (1840) *; Pfr. Symb. 
_ Hist. Helic. ii. p. 8337; Monogr. Helic. Vivent. i. p- 114°; in Martini & Chemnitz, Syst. 
Conch.-Cab. ed. 2, Heliz, ii. p. 112. no. 530, t. 85. fige. 20-23; Shuttl. in Bern Mittheil. 
1852 (Diagn. no. 6), p. 129°; Reeve, Conch. Icon. vii., Helix, t. 67. fig. 349°; Binney, 
Terr. air-breath. Moll. N, Am. iii. t. 17, fig. 2"; Morse, Am, Nat. i. p. 548, fig. 85 (1867)*; 
